North7

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Several people estimated the tire, ground clearance and door handle dimensions on this thread:
https://www.bronco6g.com/forum/thre...nco-4-door-topless-2-door-in-background.1152/

They seemed close but perhaps a little bit off so I took the photo and scaled the measurements based on the Little Giant 4 step ladder in the photo, which is 35" to the top step, per the manufacturers spec. As and example, I measured the scale distance between each step and averaged those to account for the parallax in the photo, the average rise between steps is 9". I continued the process allowing for the different angles to estimate the dimensions, this is not an exact science so the there are some uncertainties in the numbers, I did the following estimates:

1) Frame Ground Clearance: ~17.5"

2) Tire Height: ~32.6"
(potentially 265/70R18, see discussion below)

3) Bolt Pattern: 6x139.7 (6x5.5)

4) Door Handle Height: ~42"

EDIT: Updated dimensions and image based on community feedback, thank you.

2021 Bronco Clearance v2.png
 
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BE_

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those are 99% 34.5" tires
 
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North7

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those are 99% 34.5" tires
The “raptor” trim was yes. But this a lower trim. Probably smaller tire. Closer to 32” (255/70r18) vs the 34.5” on the 315/70r17
Great feedback from both of you, thank you.

I tried rescaling a few different angles, for one I get ~33.2" and the next I get ~32.8". So I'm getting closer to the 32" number.
Per tiresize.com the 255/70r18 size is 32.1" - https://tiresize.com/tiresizes/255-70R18.htm

So I'm off by .7" which appears to be the margin of error that is possible with these type of measurements. Please keep the feedback coming.
 

BroncoPaul

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Great feedback from both of you, thank you.

I tried rescaling a few different angles, for one I get ~33.2" and the next I get ~32.8". So I'm getting closer to the 32" number.
Per tiresize.com the 255/70r18 size is 32.1" - https://tiresize.com/tiresizes/255-70R18.htm

So I'm off by .7" which appears to be the margin of error that is possible with these type of measurements. Please keep the feedback coming.
You, sir, are amazing. These are the types of things that make quarantine bearable. lol

Coming from a Supply Chain background, I can assume that the lug pattern is identical to that of the F150 (6 lug is confirmed, obviously) due to the cost efficiency of using the same axles. Based on that, I would assume that the wheel dimensions would be identical to the F150 (again, economy of scale on purchasing 255/70r18 tires), which would tell us the back spacing on factory wheels.

This then allows me to shop for wheels and tires for the Bronco I don't even have yet! lol 😂
 

BroncoPaul

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Several people estimated the tire, ground clearance and door handle dimensions on this thread:
https://www.bronco6g.com/forum/thre...nco-4-door-topless-2-door-in-background.1152/

They seemed close but perhaps a little bit off so I took the photo and scaled the measurements based on the Little Giant 4 step ladder in the photo, which is 35" to the top step, per the manufacturers spec. As and example, I measured the scale distance between each step and averaged those to account for the parallax in the photo, the average rise between steps is 9". I continued the process allowing for the different angles to estimate the dimensions, this is not an exact science so the there are some uncertainties in the numbers, I did three estimates:

1) Frame Ground Clearance: ~17.5"
(a second measurement from the 2nd step blue line puts the frame at ~18".)

2) Tire Height: ~33.4"
(From the camo rigs there was a lot of discussion of 33" and 35" tires so my estimate of a 33" tire is in line with that.)

3) Door Handle Height: ~42.2"
(due to the height and angles this one has the most uncertainty.)

View attachment 5047
Also based on these rough dimensions, and assuming a 9ish inch rear end, that gives the 4 door around 12 inches of ground clearance at the rear diff.
 
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Probably same bolt pattern as Ranger 6 x 139.5 or 6 on 5 1/2
 

securitysix

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Several people estimated the tire, ground clearance and door handle dimensions on this thread:
https://www.bronco6g.com/forum/thre...nco-4-door-topless-2-door-in-background.1152/

They seemed close but perhaps a little bit off so I took the photo and scaled the measurements based on the Little Giant 4 step ladder in the photo, which is 35" to the top step, per the manufacturers spec. As and example, I measured the scale distance between each step and averaged those to account for the parallax in the photo, the average rise between steps is 9". I continued the process allowing for the different angles to estimate the dimensions, this is not an exact science so the there are some uncertainties in the numbers, I did three estimates:

1) Frame Ground Clearance: ~17.5"
(a second measurement from the 2nd step blue line puts the frame at ~18".)

2) Tire Height: ~33.4"
(From the camo rigs there was a lot of discussion of 33" and 35" tires so my estimate of a 33" tire is in line with that.)

3) Door Handle Height: ~42.2"
(due to the height and angles this one has the most uncertainty.)

View attachment 5047
That means my eyeyballed WAGs were pretty close, especially my last set. That brings me joy.
 

HoosierDaddy

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FYI, a typical 33" tire actually measures around 32.5" ....
Go to tirerack.com, find BFG AT's and click on "specs" every size they make will have the specs listed.

315/70-17 , what the rugged trim 4 door wore, are 34.4" tall.

I don't know that anybody ever determined what the other 4 door wore.
 
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HoosierDaddy

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North7

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Thank you everyone for your feedback. For the 17" Tire & Wheel I started with the 255/75 R17 tire photo HoosierDaddy referenced.

255/75R17 Tire Diameter: 32.1"
https://tiresize.com/tiresizes/255-75R17.htm

Assumption: Wheel Outer Diameter 18.5"
(I found one reference that 17" Wheels are 18.5" to 19" outer diameter. My aftermarket 17" wheels on my Sorento measure 18.5".)
https://www.moderntiredealer.com/article/311203/custom-wheel-dimensions

Bolt Pattern:
I scaled the 255/75R17 tire images to match the above dimensions, I then measured the bolt pattern. I looked at both the F-150 and Ranger bolt patterns for reference and find the bolt pattern matches the Ranger,6x139.7 (6x5.5).

Based on the this information I went back to the first post updated the dimensions and image.

Bronco 255-75R17 Wheel v1.png
 
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North7

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I then looked further into the 18" Tire & Wheel on the Black 4-door and I found the following:

The Tire measures ~32.6" and the Wheel measures 19" at the outer diameter which confirms it is an 18" size tire.

Looking at this size range chart: https://tiresize.com/height-chart/
I found this size seems to match pretty well:
Tire: 265/70R18 = 32.6 x 10.4R18
https://tiresize.com/tiresizes/265-70R18.htm

Further, it seems to be a very popular size with a large selection of available tires, All Terrain (45), Truck/SUV All Season (35).
 

Stampede.Offroad

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One problem I see with your height estimates is the line drawn from the top of the rear tire down toward the wheel of the front ... not on the same ray/perspective path as the line drawn along the bottoms of both tires.

It also appears that the body lines and those of the geometrically symetrical tires do not converge at the same point. If the designers gave it a slightly nose down stance for aerodynamics that would make sense.

.

Bronco proto ray trace.png


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